Heat management system, heat management method, electronic device, storage medium, and vehicle

Abstract

The application discloses a heat management system, a heat management method, an electronic device, a storage medium and a vehicle. The heat management system comprises a battery cooler, an indoor condenser, a compressor, a water-cooled condenser, a power battery, a radiator, a valve assembly with multiple valve assembly modes, an electric drive component, an evaporator, a water heater and a three-way valve with multiple states, and the indoor condenser and the evaporator are located in a passenger cabin. The battery cooler, the water heater, the water-cooled condenser, the power battery, the power battery and the electric drive component are connected with the valve assembly respectively. The radiator is connected with a third end of the three-way valve, the radiator is connected with a first end of the three-way valve, and the first end and a second end of the three-way valve are connected with different ends of the valve assembly respectively. The battery cooler and the water heater are used for heating, a direct heat pump heat management system working in a full temperature range is realized, the system cost is reduced, and the system has large heating power and high efficiency.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and in particular to a thermal management system, thermal management method, electronic device, storage medium, and vehicle. Background Technology

[0002] Conventional electric vehicles (EVs) employ a direct heat pump thermal management system. However, due to the properties of the refrigerant R134a / 1234yf, the heat pump cannot activate to heat the passenger compartment at ambient temperatures of -10 to -15°C. Therefore, a positive temperature coefficient (PTC) air heater is typically installed within the air conditioning unit to activate at extremely low temperatures, replacing the traditional heat pump for heating. Figure 1 As shown, the direct heat pump thermal management system includes an evaporator 1', an indoor condenser 2', an air heater 3', a battery 4', a water heater 5', and other components 6' of the thermal management system, all located within the air conditioning unit. However, at extremely low temperatures, existing systems cannot achieve simultaneous operation of the air PTC and the heat pump, requiring a larger PTC power. Furthermore, the air PTC cannot be shared with battery heating, leading to a significant increase in cost. To enable the air conditioning and battery heating to share the PTC, the direct heat pump system needs to be converted into an indirect heat pump system, along with additional components such as a water pump and a water-to-water heat exchanger. This reduces the air conditioning heating efficiency and makes it difficult to significantly reduce costs. Summary of the Invention

[0003] Therefore, it is necessary to address the technical problems of low heating efficiency and high cost of electric vehicles across the entire temperature range in existing technologies by providing a thermal management system, thermal management method, electronic equipment, storage medium, and vehicle.

[0004] This invention provides a thermal management system, including a battery cooler, an indoor condenser, a compressor, a water-cooled condenser, a power battery, a radiator, a valve assembly with multiple valve assembly modes, an electric drive component, an evaporator, a water heater, and a three-way valve with multiple states. The indoor condenser and the evaporator are located in the passenger compartment, wherein:

[0005] The refrigerant output terminal of the battery cooler and the refrigerant output terminal of the evaporator are respectively connected to the refrigerant input terminal of the compressor. The refrigerant output terminal of the compressor is connected to the refrigerant input terminal of the indoor condenser. The refrigerant output terminal of the indoor condenser is connected to the refrigerant input terminal of the battery cooler and the refrigerant input terminal of the evaporator. The refrigerant output terminal of the evaporator is connected to the refrigerant input terminal of the compressor.

[0006] The refrigerant input terminal of the water-cooled condenser is connected to the refrigerant output terminal of the compressor, and the refrigerant output terminal of the water-cooled condenser is connected to the refrigerant input terminal of the battery cooler and the refrigerant input terminal of the evaporator, respectively.

[0007] The coolant output terminal of the water heater is connected to the coolant input terminal of the battery cooling system, and the coolant output terminal of the electric drive component is connected to the coolant input terminal of the water-cooled condenser.

[0008] The coolant output terminal of the battery cooler, the coolant input terminal of the water heater, the coolant output terminal of the water-cooled condenser, the coolant input terminal of the power battery, the coolant output terminal of the power battery, and the coolant input terminal of the electric drive component are respectively connected to the valve assembly.

[0009] The coolant output end of the radiator is connected to the third end of the three-way valve, the coolant input end of the radiator is connected to the first end of the three-way valve, and the first and second ends of the three-way valve are respectively connected to different ends of the valve assembly.

[0010] Furthermore, the states of the three-way valve include a first three-way valve state and a second three-way valve state, wherein:

[0011] When the three-way valve is in the first three-way valve state, the first end of the three-way valve is connected to the second end of the three-way valve; when the three-way valve is in the second three-way valve state, the second end of the three-way valve is connected to the third end of the three-way valve.

[0012] Furthermore, the valve assembly modes of the valve assembly include a second valve assembly mode, a first valve assembly mode, a third valve assembly mode, and a fourth valve assembly mode, wherein:

[0013] In the first valve assembly mode, the coolant inlet of the water heater is connected to the second end of the three-way valve, the coolant outlet of the battery cooler is connected to the first end of the three-way valve, the coolant outlet of the power battery is connected to the coolant inlet of the electric drive component, and the coolant outlet of the water-cooled condenser is connected to the coolant inlet of the power battery.

[0014] In the second valve assembly mode, the coolant input terminal of the water heater is connected to the coolant output terminal of the power battery, the coolant output terminal of the battery cooler is connected to the coolant input terminal of the power battery, the second terminal of the three-way valve is connected to the coolant input terminal of the electric drive component, and the coolant output terminal of the water-cooled condenser is connected to the first terminal of the three-way valve.

[0015] In the third valve assembly mode, the coolant output terminal of the battery cooler is connected to the first terminal of the three-way valve, the second terminal of the three-way valve is connected to the coolant input terminal of the electric drive component, the coolant output terminal of the water-cooled condenser is connected to the coolant input terminal of the power battery, and the coolant output terminal of the power battery is connected to the coolant input terminal of the water heater.

[0016] In the fourth valve assembly mode, the second end of the three-way valve is connected to the coolant input end of the water heater, the coolant output end of the battery cooler is connected to the coolant input end of the power battery, the coolant output end of the power battery is connected to the coolant input end of the electric drive component, and the coolant output end of the water-cooled condenser is connected to the first end of the three-way valve.

[0017] Furthermore, the thermal management system has a first operating mode in which the battery cooler, the indoor condenser, the compressor, the water-cooled condenser, and the water heater are turned on, while the radiator and the evaporator are turned off. The valve assembly is in a first valve assembly mode, and the three-way valve is in a first three-way valve state.

[0018] Furthermore, the thermal management system has a second operating mode. In the second operating mode, the battery cooler, the indoor condenser, the compressor, and the water heater are turned on, while the water-cooled condenser, the radiator, and the evaporator are turned off. The valve assembly is in the second valve assembly mode, and the three-way valve is in the first three-way valve state.

[0019] Furthermore, the thermal management system has a third operating mode, in which the battery cooler, the indoor condenser, the water heater, and the radiator are turned off, and the compressor, the water-cooled condenser, and the evaporator are turned on. The valve assembly is in the first valve assembly mode, and the three-way valve is in the first three-way valve state.

[0020] This invention provides a thermal management method for the thermal management system as described above, comprising:

[0021] Obtain ambient temperature, passenger cabin heating requirements, and battery heating requirements;

[0022] Based on the ambient temperature, the passenger cabin heating requirements, and the battery heating requirements, the valve assembly mode of the valve assembly, the state of the three-way valve, and the start-up or shutdown of the water heater, the battery cooler, the indoor condenser, the compressor, the water-cooled condenser, and the evaporator are controlled.

[0023] Furthermore, the states of the three-way valve include a first three-way valve state and a second three-way valve state, and the valve assembly modes of the valve assembly include a second valve assembly mode, a first valve assembly mode, a third valve assembly mode, and a fourth valve assembly mode, wherein:

[0024] When the three-way valve is in the first three-way valve state, the first end of the three-way valve is connected to the second end of the three-way valve; when the three-way valve is in the second three-way valve state, the second end of the three-way valve is connected to the third end of the three-way valve.

[0025] In the second valve assembly mode, the coolant input terminal of the water heater is connected to the coolant output terminal of the power battery, the coolant output terminal of the battery cooler is connected to the coolant input terminal of the power battery, the second terminal of the three-way valve is connected to the coolant input terminal of the electric drive component, and the coolant output terminal of the water-cooled condenser is connected to the first terminal of the three-way valve.

[0026] In the first valve assembly mode, the coolant inlet of the water heater is connected to the second end of the three-way valve, the coolant outlet of the battery cooler is connected to the first end of the three-way valve, the coolant outlet of the power battery is connected to the coolant inlet of the electric drive component, and the coolant outlet of the water-cooled condenser is connected to the coolant inlet of the power battery.

[0027] In the third valve assembly mode, the coolant output terminal of the battery cooler is connected to the first terminal of the three-way valve, the second terminal of the three-way valve is connected to the coolant input terminal of the electric drive component, the coolant output terminal of the water-cooled condenser is connected to the coolant input terminal of the power battery, and the coolant output terminal of the power battery is connected to the coolant input terminal of the water heater.

[0028] In the fourth valve assembly mode, the second end of the three-way valve is connected to the coolant input end of the water heater, the coolant output end of the battery cooler is connected to the coolant input end of the power battery, the coolant output end of the power battery is connected to the coolant input end of the electric drive component, and the coolant output end of the water-cooled condenser is connected to the first end of the three-way valve.

[0029] The method of controlling the valve assembly mode and the state of the three-way valve based on the ambient temperature, the passenger cabin heating demand, and the battery heating demand, and controlling the start or stop of the water heater, the battery cooler, the indoor condenser, the compressor, the water-cooled condenser, and the evaporator, specifically includes:

[0030] If the ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating demand is present, and the battery heating demand is present, then the valve assembly mode controlling the valve assembly is the first valve assembly mode, the state of the three-way valve is the second three-way valve state, the indoor condenser, the water-cooled condenser, the battery cooler, and the compressor are started, and the evaporator and the water heater are turned off.

[0031] If the ambient temperature is greater than or equal to a temperature threshold, and the passenger cabin heating requirement is present, while the battery heating requirement is absent, then the valve assembly mode controlling the valve assembly is the first valve assembly mode, the state of the three-way valve is the second three-way valve state, the indoor condenser, the battery cooler, and the compressor are started, and the water-cooled condenser, the evaporator, and the water heater are shut down; or

[0032] If the ambient temperature is greater than or equal to a temperature threshold, and the passenger cabin heating requirement is zero, but the battery heating requirement is positive, then the valve assembly mode controlling the valve assembly is the first valve assembly mode, the state of the three-way valve is the second three-way valve state, the water-cooled condenser, the battery cooler, and the compressor are started, and the indoor condenser, the evaporator, and the water heater are shut down; or

[0033] If the ambient temperature is below the temperature threshold, and both the passenger cabin and battery require heating, then the valve assembly mode is changed to the second valve assembly mode, the three-way valve is set to the first three-way valve state, and the water heater, indoor condenser, battery cooler, and compressor are activated, while the water-cooled condenser and evaporator are deactivated; or

[0034] If the ambient temperature is below the temperature threshold, and the passenger cabin heating requirement is present, while the battery heating requirement is absent, then the valve assembly mode controlling the valve assembly is the first valve assembly mode, the state of the three-way valve is the first three-way valve state, the water heater, the indoor condenser, the battery cooler, and the compressor are started, and the water-cooled condenser and the evaporator are shut down; or

[0035] If the ambient temperature is below the temperature threshold, and the passenger cabin heating requirement is zero, but the battery heating requirement is positive, then the valve assembly mode of the valve assembly is set to the second valve assembly mode, the state of the three-way valve is set to the first three-way valve state, the water heater is started, and the indoor condenser, the battery cooler, the compressor, the water-cooled condenser, and the evaporator are shut down.

[0036] This invention provides an electronic device, comprising:

[0037] At least one processor; and,

[0038] A memory communicatively connected to at least one of the processors; wherein,

[0039] The memory stores instructions that can be executed by at least one of the processors to enable at least one of the processors to perform the thermal management method of the thermal management system as described above.

[0040] The present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all steps of the thermal management method of the thermal management system as described above.

[0041] The present invention provides a vehicle, including a vehicle body and a thermal management system as described above, wherein the thermal management system is mounted on the vehicle body.

[0042] This invention uses a shared battery cooler and water heater for heating, realizing a direct heat pump thermal management system that can operate across the entire temperature range. The system has fewer parts, thereby reducing system costs, and has high heating power and efficiency. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a direct heat pump thermal management system based on existing technology.

[0044] Figure 2 This is a system schematic diagram of a thermal management system in the form of a first valve assembly, according to an embodiment of the present invention.

[0045] Figure 3 This is a system schematic diagram of a thermal management system in which the valve assembly is in the second valve assembly mode according to an embodiment of the present invention;

[0046] Figure 4 This is a system schematic diagram of a thermal management system in the form of a third valve assembly, according to an embodiment of the present invention.

[0047] Figure 5 This is a system schematic diagram of a thermal management system in the form of a fourth valve assembly, according to an embodiment of the present invention.

[0048] Figure 6 This is a schematic diagram of a first example of an eight-way valve according to an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of a second example of an eight-way valve according to an embodiment of the present invention;

[0050] Figure 8 This is a schematic diagram of a third example of an eight-way valve according to an embodiment of the present invention;

[0051] Figure 9 This is a schematic diagram of the fourth example of an eight-way valve according to an embodiment of the present invention;

[0052] Figure 10 This is a flowchart illustrating the thermal management method of a thermal management system as described above, according to an embodiment of the present invention.

[0053] Figure 11 A flowchart illustrating the workflow of the thermal management method of the thermal management system in the preferred embodiment of the present invention when the ambient temperature is greater than or equal to the lowest temperature point at which only the heat pump can operate in the system.

[0054] Figure 12 The flowchart of the thermal management method of the thermal management system of the preferred embodiment of the present invention when the ambient temperature is lower than the lowest temperature point at which only the heat pump can operate;

[0055] Figure 13 This is a schematic diagram of heat transfer in the preferred embodiment of the present invention.

[0056] Figure 14 This is a schematic diagram of heat transfer in state five of the preferred embodiment of the present invention;

[0057] Figure 15 This is a schematic diagram of the hardware structure of an electronic device according to the present invention.

[0058] Marker description

[0059] 1-Battery cooler; 2-Indoor condenser; 3-Compressor; 4-Water-cooled condenser; 5-Power battery; 6-Radiator; 61-Fan; 7-Valve assembly; 8-Electric drive component; 9-Evaporator; 10-Gas-liquid separator; 11-Water heater; 12-Three-way valve; 121-First end of three-way valve; 122-Second end of three-way valve; 123-Third end of three-way valve; 13-First electronic expansion valve; 14-Second electronic expansion valve; 15-Third electronic expansion valve; 16-Fourth electronic expansion valve; 17-Check valve; 18-First water temperature sensor; 19-First electronic water pump; 20-Second water temperature sensor; 21-Third water temperature sensor; 22-Second electronic water pump; 23-Compensation water tank; 24-Temperature and pressure sensor. Detailed Implementation

[0060] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0061] like Figure 2The diagram illustrates a thermal management system according to an embodiment of the present invention, comprising a battery cooler 1, an indoor condenser 2, a compressor 3, a water-cooled condenser 4, a power battery 5, a radiator 6, a valve assembly 7 with multiple valve assembly modes, an electric drive component 8, an evaporator 9, a water heater 11, and a three-way valve 12 with multiple states. The indoor condenser 2 and the evaporator 9 are located within the passenger compartment.

[0062] The refrigerant output terminal of the battery cooler 1 and the refrigerant output terminal of the evaporator 9 are respectively connected to the refrigerant input terminal of the compressor 3. The refrigerant output terminal of the compressor 3 is connected to the refrigerant input terminal of the indoor condenser 2. The refrigerant output terminal of the indoor condenser 2 is connected to the refrigerant input terminal of the battery cooler 1 and the refrigerant input terminal of the evaporator 9. The refrigerant output terminal of the evaporator 9 is connected to the refrigerant input terminal of the compressor 3.

[0063] The refrigerant input terminal of the water-cooled condenser 4 is connected to the refrigerant output terminal of the compressor 3, and the refrigerant output terminal of the water-cooled condenser 4 is connected to the refrigerant input terminal of the battery cooler 1 and the refrigerant input terminal of the evaporator 9 respectively.

[0064] The coolant output terminal of the water heater 11 is connected to the coolant input terminal of the battery cooler 1, and the coolant output terminal of the electric drive component 8 is connected to the coolant input terminal of the water-cooled condenser 4.

[0065] The coolant output terminal of the battery cooler 1, the coolant input terminal of the water heater 11, the coolant output terminal of the water-cooled condenser 4, the coolant input terminal of the power battery 5, the coolant output terminal of the power battery 5, and the coolant input terminal of the electric drive component 8 are respectively connected to the valve assembly 7.

[0066] The coolant output end of the radiator 6 is connected to the third end 123 of the three-way valve 12, the coolant input end of the radiator 6 is connected to the first end 121 of the three-way valve 12, and the first end 121 and the second end 122 of the three-way valve 12 are respectively connected to different ends of the valve assembly 7.

[0067] Specifically, the refrigerant circuit includes four heat exchangers: an indoor condenser 2, an evaporator 9, a water-cooled condenser 4, and a battery cooler 1. The refrigerant circuit also includes four electronic expansion valves (EXVs), a compressor 3, a gas-liquid separator 10, and a check valve 17. The electronic expansion valves include a first electronic expansion valve 13, a second electronic expansion valve 14, a third electronic expansion valve 15, and a fourth electronic expansion valve 16.

[0068] The passenger cabin air conditioning unit only houses the indoor condenser 2 and evaporator 9. Evaporator 9 provides heating, while indoor condenser 2 provides cooling. No additional positive temperature coefficient (PTC) air heater is installed in the air conditioning unit. The water-cooled condenser 4 and battery cooler 1 in the refrigerant circuit are connected to the water circuit to achieve heat exchange between the refrigerant and the water circuit. The refrigerant condenses in the water-cooled condenser 4, releasing heat into the water circuit, and evaporates at the battery cooler 1, absorbing heat into the water circuit.

[0069] When the refrigerant circuit is operating, the four electronic expansion valves control the simultaneous or individual operation of the water-cooled condenser 4 and the indoor condenser 2 in the condensing section, as well as the simultaneous or individual operation of the evaporator 9 and the battery cooler 1 in the evaporating section. However, for the refrigerant system to operate, at least one component in both the condensing and evaporating sections must be operating simultaneously. Through the on / off combinations of the four components, the refrigerant circuit can achieve the 10 operating modes shown in Table 1.

[0070] Table 1. Refrigerant circuit operating modes (10 types)

[0071] Part name Water-cooled condenser Battery cooler Indoor condenser Evaporator Refrigerant Mode 1 Open Open closure closure Refrigerant Mode 2 Open closure closure Open Refrigerant Mode 3 closure closure Open Open Refrigerant Mode 4 closure Open Open closure Refrigerant Mode 5 Open Open closure Open Refrigerant Mode Six closure Open Open Open Refrigerant Mode 7 Open Open Open closure Refrigerant Mode 8 Open closure Open Open Refrigerant Mode Nine Open Open Open Open Refrigerant Mode 10 closure closure closure closure

[0072] The water circuit has four branches. Branch 1 includes a power battery 5, and preferably, branch 1 also includes a first water temperature sensor 18. Branch 2 includes an electric drive unit 8 and a water-cooled condenser 4, and preferably, branch 2 also includes a first electronic water pump 19 and a second water temperature sensor 20. The electric drive unit 8 includes an electronic control unit and a motor. Branch 3 includes a radiator 6, and preferably, branch 3 also includes a third water temperature sensor 21 and a three-way valve 12. The radiator 6 is equipped with a fan 61. Branch 4 includes a battery cooler 1, and preferably, branch 4 also includes a second electronic water pump 22 and a positive temperature coefficient (PTC) water heater 11. In addition, the compensation water tank 23 is connected to the first electronic water pump 19 and the second electronic water pump 22 respectively. Preferably, the radiator 6 is also equipped with a fan 61.

[0073] In branch circuit three, the three-way valve 12 is used to control whether the radiator 6 is short-circuited, thus switching the heat exchange between the system water circuit and the environment. When the three-way valve 12's second end 122 is connected to its third end 123, the system water circuit is connected to the radiator 6, allowing for coordinated operation between the system water circuit and the environment, achieving heat exchange. Conversely, when the three-way valve 12's first end 121 is connected to its second end 122, the system water circuit is disconnected from the radiator 6, preventing coordinated operation between the system water circuit and the environment, thus achieving heat preservation.

[0074] A three-way valve 12 is installed in branch line 3. The three-way valve 12 controls whether to short-circuit the radiator 6 through various states, realizing the switching of heat exchange between the system water circuit and the environment.

[0075] Meanwhile, the water circuit is equipped with valve assembly 7, which has multiple valve assembly modes and can realize the series-parallel switching of the four branches.

[0076] This embodiment describes a direct heat pump thermal management system that can share a PTC with battery heating and is usable across the entire temperature range. The system is a direct heat pump, offering high heating efficiency, fast heating speed, fewer system components, and lower cost. Furthermore, at ultra-low temperatures, the system can achieve simultaneous operation of the PTC and heat pump by adjusting the mode of valve assembly 7 and the state of three-way valve 12, reducing the power requirement of the PTC and achieving even faster heating speed.

[0077] At extremely low temperatures, the thermal management system of this embodiment has the following advantages: 1. It uses a shared PTC, resulting in fewer parts and reduced system costs; 2. The water PTC is coupled with the heat pump for heating, with heat coming from both the water PTC and the compressor, resulting in greater heating power; 3. When coupled for heating, the air conditioning system uses a direct heat pump, which has a higher heating efficiency than the indirect type.

[0078] This invention uses a shared battery cooler and water heater for heating, realizing a direct heat pump thermal management system that can operate across the entire temperature range. The system has fewer parts, thereby reducing system costs, and has high heating power and efficiency.

[0079] like Figures 2 to 6 The diagram illustrates another embodiment of a thermal management system of the present invention, comprising a battery cooler 1, an indoor condenser 2, a compressor 3, a water-cooled condenser 4, a power battery 5, a radiator 6, a valve assembly 7 with multiple valve assembly modes, an electric drive component 8, an evaporator 9, a water heater 11, and a three-way valve 12 with multiple states. The indoor condenser 2 and the evaporator 9 are located within the passenger compartment.

[0080] The refrigerant output terminal of the battery cooler 1 and the refrigerant output terminal of the evaporator 9 are respectively connected to the refrigerant input terminal of the compressor 3. The refrigerant output terminal of the compressor 3 is connected to the refrigerant input terminal of the indoor condenser 2. The refrigerant output terminal of the indoor condenser 2 is connected to the refrigerant input terminal of the battery cooler 1 and the refrigerant input terminal of the evaporator 9. The refrigerant output terminal of the evaporator 9 is connected to the refrigerant input terminal of the compressor 3.

[0081] The refrigerant input terminal of the water-cooled condenser 4 is connected to the refrigerant output terminal of the compressor 3, and the refrigerant output terminal of the water-cooled condenser 4 is connected to the refrigerant input terminal of the battery cooler 1 and the refrigerant input terminal of the evaporator 9 respectively.

[0082] The coolant output terminal of the water heater 11 is connected to the coolant input terminal of the battery cooler 1, and the coolant output terminal of the electric drive component 8 is connected to the coolant input terminal of the water-cooled condenser 4.

[0083] The coolant output terminal of the battery cooler 1, the coolant input terminal of the water heater 11, the coolant output terminal of the water-cooled condenser 4, the coolant input terminal of the power battery 5, the coolant output terminal of the power battery 5, and the coolant input terminal of the electric drive component 8 are respectively connected to the valve assembly 7.

[0084] The coolant output end of the radiator 6 is connected to the third end 123 of the three-way valve 12, the coolant input end of the radiator 6 is connected to the first end 121 of the three-way valve 12, and the first end 121 and the second end 122 of the three-way valve 12 are respectively connected to different ends of the valve assembly 7.

[0085] The states of the three-way valve 12 include a first three-way valve state and a second three-way valve state, wherein:

[0086] When the three-way valve 12 is in the first three-way valve state, the first end 121 of the three-way valve is connected to the second end 122 of the three-way valve; when the three-way valve 12 is in the second three-way valve state, the second end 122 of the three-way valve is connected to the third end 123 of the three-way valve.

[0087] The valve assembly 7 has four valve assembly modes: a second valve assembly mode, a first valve assembly mode, a third valve assembly mode, and a fourth valve assembly mode, wherein:

[0088] In the first valve assembly mode, the coolant input end of the water heater 11 is connected to the second end 122 of the three-way valve, the coolant output end of the battery cooler 1 is connected to the first end 121 of the three-way valve, the coolant output end of the power battery 5 is connected to the coolant input end of the electric drive component 8, and the coolant output end of the water-cooled condenser 4 is connected to the coolant input end of the power battery 5.

[0089] In the second valve assembly mode, the coolant input end of the water heater 11 is connected to the coolant output end of the power battery 5, the coolant output end of the battery cooler 1 is connected to the coolant input end of the power battery 5, the second end 122 of the three-way valve is connected to the coolant input end of the electric drive component 8, and the coolant output end of the water-cooled condenser 4 is connected to the first end 121 of the three-way valve.

[0090] In the third valve assembly mode, the coolant output terminal of the battery cooler 1 is connected to the first terminal 121 of the three-way valve, the second terminal 122 of the three-way valve is connected to the coolant input terminal of the electric drive component 8, the coolant output terminal of the water-cooled condenser 4 is connected to the coolant input terminal of the power battery 5, and the coolant output terminal of the power battery 5 is connected to the coolant input terminal of the water heater 11.

[0091] In the fourth valve assembly mode, the second end 122 of the three-way valve is connected to the coolant input end of the water heater 11, the coolant output end of the battery cooler 1 is connected to the coolant input end of the power battery 5, the coolant output end of the power battery 5 is connected to the coolant input end of the electric drive component 8, and the coolant output end of the water-cooled condenser 4 is connected to the first end 121 of the three-way valve.

[0092] The thermal management system has a first working mode, a second working mode, and a third working mode:

[0093] In the first working mode, the battery cooler 1, the indoor condenser 2, the compressor 3, the water-cooled condenser 4, and the water heater 11 are turned on, the radiator 6 and the evaporator 9 are turned off, the valve assembly 7 is in the first valve assembly mode, and the three-way valve 12 is in the first three-way valve state.

[0094] In the second working mode, the battery cooler 1, the indoor condenser 2, the compressor 3, and the water heater 11 are turned on, while the water-cooled condenser 4, the radiator 6, and the evaporator 9 are turned off. The valve assembly 7 is in the second valve assembly mode, and the three-way valve 12 is in the first three-way valve state.

[0095] The thermal management system has a third working mode. In the third working mode, the battery cooler 1, the indoor condenser 2, the water heater 11, and the radiator 6 are turned off, while the compressor 3, the water-cooled condenser 4, and the evaporator 9 are turned on. The valve assembly 7 is in the first valve assembly mode, and the three-way valve 12 is in the first three-way valve state.

[0096] Specifically, the refrigerant circuit includes four heat exchangers: an indoor condenser 2, an evaporator 9, a water-cooled condenser 4, and a battery cooler 1. The refrigerant circuit also includes four electronic expansion valves (EXVs), a compressor 3, a gas-liquid separator 10, and a check valve 17. The electronic expansion valves include a first electronic expansion valve 13, a second electronic expansion valve 14, a third electronic expansion valve 15, and a fourth electronic expansion valve 16.

[0097] The passenger cabin air conditioning unit only houses the indoor condenser 2 and the evaporator 9. The refrigerant output terminals of the battery cooler 1 and the evaporator 9 are connected to the refrigerant input terminal of the compressor 3 via a gas-liquid separator 10. Preferably, a temperature and pressure sensor 24 is installed between the gas-liquid separator 10 and the compressor 3. The temperature and pressure sensor 24 is also installed between the second electronic expansion valve 14 and the one-way valve 17. The evaporator 9 provides heating, and the indoor condenser 2 provides cooling; no additional positive temperature coefficient (PTC) air heater is installed in the air conditioning unit. The water-cooled condenser 4 and the battery cooler 1 in the refrigerant circuit are connected to the water circuit to achieve heat exchange between the refrigerant and the water circuit. The refrigerant condenses in the water-cooled condenser 4, releasing heat to the water circuit, and evaporates at the battery cooler 1, absorbing heat to the water circuit.

[0098] When the refrigerant circuit is operating, the four electronic expansion valves control the simultaneous or individual operation of the water-cooled condenser 4 and the indoor condenser 2 in the condensing section, as well as the simultaneous or individual operation of the evaporator 9 and the battery cooler 1 in the evaporating section. However, for the refrigerant system to operate, at least one component in both the condensing and evaporating sections must be operating simultaneously. Through the on / off combinations of the four components, the refrigerant circuit can achieve the 10 operating modes shown in Table 1.

[0099] The water circuit has four branches. Branch 1 includes a power battery 5, and preferably, branch 1 also includes a first water temperature sensor 18. Branch 2 includes an electric drive unit 8 and a water-cooled condenser 4, and preferably, branch 2 also includes a first electronic water pump 19 and a second water temperature sensor 20. The electric drive unit 8 includes an electronic control unit and a motor. Branch 3 includes a radiator 6, and preferably, branch 3 also includes a third water temperature sensor 21 and a three-way valve 12. The radiator 6 is equipped with a fan 61. Branch 4 includes a battery cooler 1 and a positive temperature coefficient (PTC) water heater 11, and preferably, branch 4 also includes a second electronic water pump 22. In addition, the compensation water tank 23 is connected to the first electronic water pump 19 and the second electronic water pump 22 respectively.

[0100] In branch circuit three, the three-way valve 12 is used to control whether the radiator 6 is short-circuited, thereby switching the heat exchange between the system water circuit and the environment. When the valve is actuated by connecting its second end 122 to its third end 123, the system water circuit and the environment can be coordinated for heat exchange. However, when the valve is actuated by connecting its first end 121 to its second end 122, the system water circuit and the environment cannot be coordinated, thus achieving heat preservation.

[0101] The water circuit is equipped with valve assembly 7, which can realize the series-parallel switching of the four branches. Valve assembly 7 can realize four modes in total, including:

[0102] like Figure 2 The diagram shows the configuration of the first valve assembly: branch one and branch two are connected in series, and branch three and branch four are connected in series.

[0103] like Figure 3 The second valve assembly configuration is shown: branch one and branch four are connected in series, and branch two and branch three are connected in series.

[0104] like Figure 4 The third valve assembly configuration shown is as follows: Branch 1, Branch 4, Branch 3 and Branch 2 are connected in series.

[0105] like Figure 5 The fourth valve assembly configuration shown is as follows: Branch 1, Branch 2, Branch 3 and Branch 4 are connected in series.

[0106] The function of valve assembly 7 can be achieved using an eight-way valve or by combining two ordinary four-way valves.

[0107] Preferably, such as Figures 6 to 9 The valve assembly 7 is an eight-way valve.

[0108] The first end of the eight-way valve is connected to the coolant inlet of the water heater 11;

[0109] The second end of the eight-way valve is connected to the coolant output end of the battery cooler 1;

[0110] The third end of the eight-way valve is connected to the coolant output end of the power battery 5.

[0111] The fourth end of the eight-way valve is connected to the coolant input end of the power battery 5;

[0112] The fifth end of the eight-way valve is connected to the coolant input end of the electric drive component 8;

[0113] The sixth end of the eight-way valve is connected to the coolant output end of the water-cooled condenser 4.

[0114] The seventh end of the eight-way valve is connected to the second end 122 of the three-way valve;

[0115] The eighth end of the eight-way valve is connected to the first end 121 of the three-way valve.

[0116] When the eight-way valve is in the first valve assembly mode, the first end of the eight-way valve is connected to the seventh end, the second end is connected to the eighth end, the third end is connected to the fifth end, and the fourth end is connected to the sixth end.

[0117] When the eight-way valve is in the second valve assembly mode, the first end of the eight-way valve is connected to the third end, the second end is connected to the fourth end, the fifth end is connected to the seventh end, and the sixth end is connected to the eighth end.

[0118] When the eight-way valve is in the third valve assembly mode, the first end of the eight-way valve is connected to the third end, the second end is connected to the eighth end, the fourth end is connected to the sixth end, and the fifth end is connected to the seventh end.

[0119] When the eight-way valve is in the fourth valve assembly mode, the first end of the eight-way valve is connected to the seventh end, the second end is connected to the fourth end, the third end is connected to the fifth end, and the sixth end is connected to the eighth end.

[0120] By combining water circuit valve assembly 7 with three-way valve 12, eight water circuit modes can be achieved. The system's refrigerant circuit and water circuit can be combined in a cross-configuration manner to achieve 80 operating circuit states.

[0121] Specifically, the thermal management system has a first working mode, a second working mode, and a third working mode.

[0122] In the first operating mode, the valve assembly 7 is in the first valve assembly mode, and the three-way valve 12 is in the first three-way valve state.

[0123] In the first operating mode, the heat pump and water heater 11 are coupled to heat the passenger compartment, and / or the heat pump and water heater 11 are coupled to heat the power battery 5.

[0124] In the first operating mode, the battery cooler 1, indoor condenser 2, compressor 3, water-cooled condenser 4, and water heater 11 are turned on, while the radiator 6 and evaporator 9 are turned off. Valve assembly 7 is in the first valve assembly mode, and three-way valve 12 is in the first three-way valve state, short-circuiting the radiator 6. Simultaneously, the first electronic water pump 19 and electric drive component 8 can also be turned on. In the first valve assembly mode, branch one and branch two are connected in series, and branch three and branch four are connected in series. Therefore, valve assembly 7 connects the coolant output terminal of battery cooler 1 to the first end 121 of three-way valve, connects the second end 122 of three-way valve to the coolant input terminal of water heater 11, connects the coolant output terminal of water-cooled condenser 4 to the coolant input terminal of power battery 5, and connects the coolant output terminal of power battery 5 to the coolant input terminal of electric drive component 8. Since three-way valve 12 is in the first three-way valve state, the first end 121 and the second end 122 of three-way valve are connected, disconnecting the system water circuit from the radiator 6.

[0125] Therefore, the heat transfer on the refrigerant side is as follows:

[0126] First route: Battery cooler 1 --> Indoor condenser 2 --> Passenger cabin air;

[0127] Second route: Battery cooler 1 --> Water-cooled condenser 4 (transmitted to power battery 5 via water circuit);

[0128] Heat transfer on the water side is as follows:

[0129] Branch circuit 3 and branch circuit 4 are connected in series: water heater 11 --> battery cooler 1;

[0130] Branch 1 and Branch 2 are connected in series: Electric drive component 8 --> Water-cooled condenser 4 --> Power battery 5.

[0131] In the first operating mode, a direct heat pump air conditioner is implemented, with the air conditioner and battery sharing a single heater. The system can achieve full-temperature-range heat pump start-up heating to meet the heating needs of the passenger cabin / battery under ultra-low temperatures. There is no need to install a high-pressure PTC heater inside the air conditioner box, which is one less heater than existing technology solutions. Moreover, the direct heat pump starts up at ultra-low temperatures, significantly improving the heating speed.

[0132] Heating is achieved by coupling a heat pump with a water heater 11, increasing the upper limit of the total heating power. The maximum heating capacity is the power α1 of the compressor 3 plus the power β1 of the water heater 11. The total heating power requirement Z is the sum of the battery heating requirement and the passenger cabin air conditioning heating requirement (battery + motor). Therefore, under the premise that the total heating power requirement Z remains unchanged, compared with the conventional indirect heat pump system sharing a PTC, the PCT power requirement in this embodiment is reduced to Z-α1. Therefore, in this embodiment, the power of the selected PTC is reduced in the first operating mode, saving costs.

[0133] Meanwhile, in the first working mode of this embodiment, the electric drive component 8 (including the electronic control component and the motor) is also connected in series with the power battery 5, and the heat of the motor can simultaneously heat the power battery 5, realizing the recovery of motor waste heat.

[0134] The second operating mode enables the heat pump to couple with the water heater 11 to heat the passenger cabin and / or the water heater 11 to directly heat the power battery 5.

[0135] In the second operating mode, the battery cooler 1, indoor condenser 2, compressor 3, and water heater 11 are turned on, while the water-cooled condenser 4, radiator 6, and evaporator 9 are turned off. Valve assembly 7 is in the second valve assembly mode, and three-way valve 12 is in the first three-way valve state, short-circuiting radiator 6. In the second valve assembly mode, branch one and branch four are connected in series, and branch two and branch three are connected in series. Therefore, valve assembly 7 connects the coolant output terminal of battery cooler 1 to the coolant input terminal of power battery 5, connects the coolant output terminal of power battery 5 to the coolant input terminal of water heater 11, connects the coolant output terminal of water-cooled condenser 4 to the first end 121 of three-way valve, and connects the second end 122 of three-way valve to the coolant input terminal of electric drive component 8. Since three-way valve 12 is in the first three-way valve state, the first end 121 and the second end 122 of three-way valve are connected, and the system water circuit is disconnected from radiator 6.

[0136] Therefore, the heat transfer on the refrigerant side is as follows:

[0137] Battery cooler 1 --> Indoor condenser 2 --> Passenger cabin air.

[0138] Heat transfer on the water side is as follows:

[0139] Branch circuit 1 and branch circuit 4 are connected in series: water heater 11 --> battery cooler 1; water heater 11 --> power battery 5.

[0140] Branch circuit 2 and branch circuit 3 are connected in series: This branch circuit is not working, or the water pump is circulating at a low flow rate.

[0141] In the second operating mode, the direct heat pump and water heater 11 can be used together. The system can start the heat pump for heating in the entire temperature range to meet the heating needs of the passenger cabin / battery under ultra-low temperature conditions. There is no need to install a high-pressure PTC heater in the air conditioning unit. Compared with the existing technology, there is one less heater. Moreover, the direct heat pump starts at ultra-low temperature, and the heating speed is greatly improved.

[0142] When the motor's residual heat is insufficient, the motor's heating power α2 is less than the electronic water pump's power β2. At this time, using the first working mode is no longer economical, and the second working mode can be switched.

[0143] Meanwhile, this embodiment can improve the actual operating power of the PTC, reduce the limitation imposed by the battery inlet temperature ≤50℃, and improve the heating speed of the passenger compartment. During power battery heating, there may be scenarios where the battery temperature has not reached the target temperature, but the PTC outlet water temperature has already reached 50℃. In such cases, to avoid damage to some battery cells due to excessively high water temperature, existing technologies limit the PTC power. Therefore, in this embodiment, in the second operating mode, the coolant outlet of the water heater 11 is connected to the coolant inlet of the battery cooler 1, allowing the battery cooler 1 to absorb heat, thereby reducing the water temperature before it enters the power battery 5, thus reducing scenarios that limit PTC power.

[0144] The third operating mode enables the storage of passenger cabin heat in the battery.

[0145] In the third operating mode, the battery cooler 1, indoor condenser 2, water heater 11, and radiator 6 are turned off, while the compressor 3, water-cooled condenser 4, and evaporator 9 are turned on. Valve assembly 7 is in the first valve assembly mode, and three-way valve 12 is in the first three-way valve state, short-circuiting radiator 6. Simultaneously, the first electronic water pump 19 and electric drive component 8 can also be turned on. In the first valve assembly mode, branch one and branch two are connected in series, and branch three and branch four are connected in series. Therefore, valve assembly 7 connects the coolant output terminal of battery cooler 1 to the first end 121 of three-way valve, connects the second end 122 of three-way valve to the coolant input terminal of water heater 11, connects the coolant output terminal of water-cooled condenser 4 to the coolant input terminal of power battery 5, and connects the coolant output terminal of power battery 5 to the coolant input terminal of electric drive component 8. Since three-way valve 12 is in the first three-way valve state, the first end 121 of three-way valve and the second end 122 of three-way valve are connected, disconnecting the system water circuit from radiator 6.

[0146] Therefore, the heat transfer on the refrigerant side is as follows:

[0147] Passenger compartment --> Evaporator 9 -> Water-cooled condenser 4 (transmitted to power battery 5 via water circuit).

[0148] Heat transfer on the water side is as follows:

[0149] Branch 1 and Branch 2 are connected in series: (Electric drive component 8 -->) Water-cooled condenser 4 --> Power battery 5;

[0150] Branch circuit 3 and branch circuit 4 are connected in series: This branch circuit is not working, or the water pump is circulating at a low flow rate.

[0151] Due to factors such as windows, the passenger compartment has poorer insulation than the battery pack, causing heat to dissipate quickly into the environment after parking. In short-term parking scenarios, the third operating mode stores this heat in the power battery 5. When the vehicle starts again, the power battery 5 retains some residual heat, reducing heating power requirements and lowering vehicle energy consumption.

[0152] like Figure 10 The diagram shown is a flowchart of a thermal management method for a thermal management system as described above, according to an embodiment of the present invention, including:

[0153] Step S1001: Obtain ambient temperature, passenger cabin heating requirements, and battery heating requirements;

[0154] Step S1002: Based on the ambient temperature, the passenger cabin heating requirements, and the battery heating requirements, control the valve assembly mode of the valve assembly 7 and the state of the three-way valve 12, and control the start or stop of the water heater 11, the battery cooler 1, the indoor condenser 2, the compressor 3, the water-cooled condenser 4, and the evaporator 9.

[0155] Specifically, the present invention can be applied to electronic devices with processing capabilities in vehicles, such as electronic control units (ECUs).

[0156] Specifically, this embodiment describes the thermal management method of the aforementioned thermal management system. Step S1001 involves acquiring the ambient temperature, passenger cabin heating requirements, and battery heating requirements.

[0157] The passenger cabin heating requirement refers to whether or not there is a need for passenger cabin heating, including both cases where there is and cases where there is no need for passenger cabin heating. The battery heating requirement refers to whether or not there is a need for battery heating, including both cases where there is and cases where there is no need for battery heating.

[0158] Then, based on the ambient temperature, the passenger cabin heating requirements, and the battery heating requirements, step S1002 is executed to control the valve assembly mode of the valve assembly 7 and the state of the three-way valve 12, and to control the start or stop of each component. The components include: a water heater 11, a battery cooler 1, an indoor condenser 2, a compressor 3, a water-cooled condenser 4, and an evaporator 9.

[0159] This invention uses a shared battery cooler and water heater for heating, realizing a direct heat pump thermal management system that can operate across the entire temperature range. The system has fewer parts, thereby reducing system costs, and has high heating power and efficiency.

[0160] In one embodiment, the states of the three-way valve 12 include a first three-way valve state and a second three-way valve state, and the valve assembly modes of the valve assembly 7 include a second valve assembly mode, a first valve assembly mode, a third valve assembly mode, and a fourth valve assembly mode, wherein:

[0161] When the three-way valve 12 is in the first three-way valve state, the first end 121 of the three-way valve is connected to the second end 122 of the three-way valve; when the three-way valve 12 is in the second three-way valve state, the second end 122 of the three-way valve is connected to the third end 123 of the three-way valve.

[0162] In the second valve assembly mode, the coolant input end of the water heater 11 is connected to the coolant output end of the power battery 5, the coolant output end of the battery cooler 1 is connected to the coolant input end of the power battery 5, the second end 122 of the three-way valve is connected to the coolant input end of the electric drive component 8, and the coolant output end of the water-cooled condenser 4 is connected to the first end 121 of the three-way valve.

[0163] In the first valve assembly mode, the coolant input end of the water heater 11 is connected to the second end 122 of the three-way valve, the coolant output end of the battery cooler 1 is connected to the first end 121 of the three-way valve, the coolant output end of the power battery 5 is connected to the coolant input end of the electric drive component 8, and the coolant output end of the water-cooled condenser 4 is connected to the coolant input end of the power battery 5.

[0164] In the third valve assembly mode, the coolant output terminal of the battery cooler 1 is connected to the first terminal 121 of the three-way valve, the second terminal 122 of the three-way valve is connected to the coolant input terminal of the electric drive component 8, the coolant output terminal of the water-cooled condenser 4 is connected to the coolant input terminal of the power battery 5, and the coolant output terminal of the power battery 5 is connected to the coolant input terminal of the water heater 11.

[0165] In the fourth valve assembly mode, the second end 122 of the three-way valve is connected to the coolant input end of the water heater 11, the coolant output end of the battery cooler 1 is connected to the coolant input end of the power battery 5, the coolant output end of the power battery 5 is connected to the coolant input end of the electric drive component 8, and the coolant output end of the water-cooled condenser 4 is connected to the first end 121 of the three-way valve.

[0166] The method of controlling the valve assembly mode of the valve assembly 7 and the state of the three-way valve 12 based on the ambient temperature, the passenger cabin heating demand, and the battery heating demand, and controlling the start-up or shutdown of the water heater 11, the battery cooler 1, the indoor condenser 2, the compressor 3, the water-cooled condenser 4, and the evaporator 9, specifically includes:

[0167] If the ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating demand is present, and the battery heating demand is present, then the valve assembly mode of the valve assembly 7 is the first valve assembly mode, the state of the three-way valve 12 is the second three-way valve state, the indoor condenser 2, the water-cooled condenser 4, the battery cooler 1, and the compressor 3 are started, and the evaporator 9 and the water heater 11 are turned off.

[0168] If the ambient temperature is greater than or equal to a temperature threshold, and the passenger cabin heating requirement is present, while the battery heating requirement is absent, then the valve assembly mode of the valve assembly 7 is set to the first valve assembly mode, the state of the three-way valve 12 is set to the second three-way valve state, the indoor condenser 2, the battery cooler 1, and the compressor 3 are activated, and the water-cooled condenser 4, the evaporator 9, and the water heater 11 are deactivated; or

[0169] If the ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating requirement is zero, but the battery heating requirement is present, then the valve assembly mode of the valve assembly 7 is set to the first valve assembly mode, the state of the three-way valve 12 is set to the second three-way valve state, the water-cooled condenser 4, the battery cooler 1, and the compressor 3 are started, and the indoor condenser 2, the evaporator 9, and the water heater 11 are shut down; or

[0170] If the ambient temperature is below the temperature threshold, and both the passenger cabin and battery require heating, then the valve assembly 7 is controlled to operate in the second valve assembly mode, the three-way valve 12 is in the first three-way valve state, the water heater 11, the indoor condenser 2, the battery cooler 1, and the compressor 3 are activated, and the water-cooled condenser 4 and the evaporator 9 are deactivated; or

[0171] If the ambient temperature is below the temperature threshold, and the passenger cabin heating requirement is present, while the battery heating requirement is absent, then the valve assembly mode of the valve assembly 7 is set to the first valve assembly mode, the state of the three-way valve 12 is set to the first three-way valve state, and the water heater 11, the indoor condenser 2, the battery cooler 1, and the compressor 3 are activated, while the water-cooled condenser 4 and the evaporator 9 are shut down; or

[0172] If the ambient temperature is below the temperature threshold, and the passenger cabin heating requirement is zero, but the battery heating requirement is positive, then the valve assembly mode of the valve assembly 7 is set to the second valve assembly mode, the state of the three-way valve 12 is set to the first three-way valve state, the water heater 11 is started, and the indoor condenser 2, the battery cooler 1, the compressor 3, the water-cooled condenser 4, and the evaporator 9 are shut down.

[0173] Specifically, based on three conditions—ambient temperature ≥ T, passenger compartment heating requirement (ON / OFF), and battery heating requirement (ON / OFF)—the system sequentially determines the current heating demand of the entire vehicle, resulting in eight possible outcomes. In states four and eight, the vehicle has no heating demand; in the remaining states, the vehicle has different heating requirements. T represents the lowest temperature at which only the heat pump can operate, obtained through calibration, typically ranging from -10 to -15°C.

[0174] Specifically, such as Figure 11 The diagram shown is a flowchart illustrating the workflow of the thermal management method of the thermal management system according to the preferred embodiment of the present invention when the ambient temperature is greater than or equal to the lowest temperature at which only the heat pump can operate in the system. The workflow includes:

[0175] Step S1101: Determine if the ambient temperature is ≥ T. If yes, proceed to step S1102; otherwise, use... Figure 12 The thermal management method shown;

[0176] If there is a need for passenger cabin heating in step S1102, proceed to step S1103; otherwise, proceed to step S1106.

[0177] Step S1103: If there is a battery heating requirement, it is state one. At this time, the ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating requirement is present, and the battery heating requirement is present. Then, proceed to step S1104, where the heat pump heats the passenger cabin and the power battery. Otherwise, it is state two. The ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating requirement is present, and the battery heating requirement is absent. Then, proceed to step S1105, where the heat pump is the passenger cabin heater.

[0178] Step S1104, in the water-side loop:

[0179] ①Adjust valve assembly 7 so that branch one and branch two are connected in series, and branch three and branch four are connected in series;

[0180] ② Adjust the three-way valve 12 so that the second end 122 of the three-way valve is connected to the third end 123 of the three-way valve;

[0181] ③ When the first electronic water pump 19 and the second electronic water pump 22 in the system are started, the water heater 11 does not work;

[0182] In the refrigerant circuit:

[0183] ① Adjust the four electronic expansion valves to make the indoor condenser 2, water-cooled condenser 4, and battery cooler 1 work, and disconnect the evaporator 9;

[0184] ② Start compressor 3 to drive the refrigerant to work;

[0185] Step S1105, in the water-side loop:

[0186] ①Adjust valve assembly 7 so that branch one and branch two are connected in series, and branch three and branch four are connected in series;

[0187] ② Adjust the three-way valve 12 so that the second end 122 of the three-way valve is connected to the third end 123 of the three-way valve;

[0188] ③ Start the first electronic water pump 19 and the second electronic water pump 22 in the system, but the first electronic water pump 19 works at a low flow rate and the water heater 11 does not work.

[0189] In the refrigerant circuit:

[0190] ① Adjust the four electronic expansion valves to make the indoor condenser 2 and battery cooler 1 work, and disconnect the water-cooled condenser 4 and evaporator 9;

[0191] ② Start compressor 3 to drive the refrigerant to work;

[0192] Step S1106: If there is a battery heating requirement, then it is state three. At this time, the ambient temperature is greater than or equal to the temperature threshold, the passenger cabin heating requirement is not present, and the battery heating requirement is present. Then proceed to step S1107, where the heat pump heats the power battery. Otherwise, it is state four, where the ambient temperature is greater than or equal to the temperature threshold, the passenger cabin heating requirement is not present, and the battery heating requirement is not present. Then proceed to step S1108.

[0193] Step S1107, in the water-side loop:

[0194] ①Adjust valve assembly 7 so that branch one and branch two are connected in series, and branch three and branch four are connected in series;

[0195] ② Adjust the three-way valve 12 so that the second end 122 of the three-way valve is connected to the third end 123 of the three-way valve;

[0196] ③ When the first electronic water pump 19 and the second electronic water pump 22 in the system are started, the water heater 11 does not work;

[0197] In the refrigerant circuit:

[0198] ① Adjust the four electronic expansion valves to make the water-cooled condenser 4 and battery cooler 1 work, and disconnect the indoor condenser 2 and evaporator 9;

[0199] ② Start compressor 3 to drive the refrigerant to work;

[0200] Step S1108: Close all components.

[0201] Among them, State 1, State 2 and State 3 are different scenarios of the fourth working mode, while State 6 is the first working mode and State 7 is the second working mode.

[0202] like Figure 12 As shown, the flowchart illustrates the workflow of the thermal management method of the thermal management system in the preferred embodiment of the present invention when the ambient temperature is lower than the lowest temperature at which only the heat pump can operate, i.e., when the system is in an ultra-low temperature state. The method includes:

[0203] If there is a need for passenger cabin heating, proceed to step S1202; otherwise, proceed to step S1205.

[0204] Step S1202: If there is a battery heating requirement, then it is state five. At this time, the ambient temperature is less than the temperature threshold, and the passenger cabin heating requirement is present, and the battery heating requirement is present. Then, step S1203 is executed, where the heat pump and water heater heat the passenger cabin, and the water heater heats the power battery. Otherwise, it is state six, where the ambient temperature is less than the temperature threshold, the passenger cabin heating requirement is present, and the battery heating requirement is absent. Then, step S1204 is executed, where the heat pump and water heater heat the passenger cabin.

[0205] Step S1203, in the water-side loop:

[0206] ① Adjust valve assembly 7 so that branch one and branch four are connected in series, and branch two and branch three are connected in series;

[0207] ② Adjust the three-way valve 12 so that the first end 121 of the three-way valve is connected to the second end 122 of the three-way valve;

[0208] ③ Start the first electronic water pump 19 and the second electronic water pump 22 in the system, but the first electronic water pump 19 operates at a low flow rate and the water heater 11 starts working.

[0209] In the refrigerant circuit:

[0210] ① Adjust the four electronic expansion valves to make the indoor condenser 2 and battery cooler 1 work, and disconnect the water-cooled condenser 4 and evaporator 9;

[0211] ② Start compressor 3 to drive the refrigerant to work;

[0212] Step S1204, in the water-side loop:

[0213] ①Adjust valve assembly 7 so that branch one and branch two are connected in series, and branch three and branch four are connected in series;

[0214] ② Adjust the three-way valve 12 so that the first end 121 of the three-way valve is connected to the second end 122 of the three-way valve;

[0215] ③ Start the first electronic water pump 19 and the second electronic water pump 22 in the system, but the first electronic water pump 19 operates at a low flow rate and the water heater 11 starts working.

[0216] In the refrigerant circuit:

[0217] ① Adjust the four electronic expansion valves to make the indoor condenser 2 and battery cooler 1 work, and disconnect the water-cooled condenser 4 and evaporator 9;

[0218] ② Start compressor 3 to drive the refrigerant to work;

[0219] Step S1205: If there is a battery heating requirement, then it is state seven. At this time, the ambient temperature is less than the temperature threshold, the passenger cabin heating requirement is not present, and the battery heating requirement is present. Then proceed to step S1206, where the water heater heats the power battery. Otherwise, it is state eight, where the ambient temperature is less than the temperature threshold, the passenger cabin heating requirement is not present, and the battery heating requirement is not present. Then proceed to step S1207.

[0220] Step S1206, in the water-side loop:

[0221] ① Adjust valve assembly 7 so that branch one and branch four are connected in series, and branch two and branch three are connected in series;

[0222] ② Adjust the three-way valve 12 so that the first end 121 of the three-way valve is connected to the second end 122 of the three-way valve;

[0223] ③ Start the first electronic water pump 19 and the second electronic water pump 22 in the system, but the first electronic water pump 19 operates at a low flow rate and the water heater 11 starts working.

[0224] In the refrigerant circuit: Not working.

[0225] ① Turn off indoor condenser 2, water-cooled condenser 4, battery cooler 1, and evaporator 9;

[0226] ② Compressor 3 is not working;

[0227] Step S1207: Close all components.

[0228] Among them, such as Figure 13 This is a schematic diagram of heat transfer in state one. The intense heat transfer in state one is shown by the arrows. Figure 14 This is a schematic diagram of heat transfer in state five, where the intense heat transfer is indicated by arrows. Specifically, in states where heating is required, according to... Figure 11 and Figure 12 The system is controlled using the following control method. First, the water-side circuit is switched, then the water pump is started as needed, and finally, the water heater 11 is started as needed. Components must operate in the required sequence. After the water-side circuit is activated, wait 5-10 seconds until the system flow stabilizes before starting the refrigerant circuit components. In the refrigerant circuit, first adjust the four electronic expansion valves to open and close as required, wait 5-10 seconds until the electronic expansion valves reach their preset positions, then start the compressor 3, and the system begins to operate as required.

[0229] like Figure 15 The diagram shown is a hardware structure schematic of an electronic device according to the present invention, comprising:

[0230] At least one processor 1501; and,

[0231] A memory 1502 is communicatively connected to at least one of the processors 1501; wherein,

[0232] The memory 1502 stores instructions that can be executed by at least one of the processors to enable the at least one of the processors to perform the thermal management method of the thermal management system as described above.

[0233] Figure 15 Take a processor 1501 as an example.

[0234] The electronic device may also include an input device 1503 and a display device 1504.

[0235] The processor 1501, memory 1502, input device 1503 and display device 1504 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0236] The memory 1502, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the thermal management method of the thermal management system in the embodiments of this application, for example, Figure 10 The method flow is shown. The processor 1501 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules stored in the memory 1502, thereby realizing the thermal management method of the thermal management system in the above embodiment.

[0237] Memory 1502 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created according to the use of the thermal management method of the thermal management system, etc. Furthermore, memory 1502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 1502 may optionally include memory remotely located relative to processor 1501, and these remote memories may be connected via a network to means of performing the thermal management method of the thermal management system. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0238] The input device 1503 can receive user clicks and generate signal inputs related to user settings and function control of the thermal management system. The display device 1504 may include a display screen or other display equipment.

[0239] When one or more modules are stored in the memory 1502 and are run by one or more processors 1501, the thermal management method of the thermal management system in any of the above method embodiments is executed.

[0240] This invention uses a shared battery cooler and water heater for heating, realizing a direct heat pump thermal management system that can operate across the entire temperature range. The system has fewer parts, thereby reducing system costs, and has high heating power and efficiency.

[0241] One embodiment of the present invention provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all steps of the thermal management method of the thermal management system as described above.

[0242] One embodiment of the present invention provides a vehicle, including a vehicle body and a thermal management system as described above, wherein the thermal management system is installed on the vehicle body.

[0243] Understandably, the vehicle may also include a processor, a memory, and a computer program. The computer program is stored in the memory and configured to be executed by the processor to implement the thermal management method of the thermal management system provided in this disclosure embodiment. The processor and memory are already... Figure 15 The parts of the illustrated embodiments will not be repeated here.

[0244] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A thermal management system, characterized in that, Includes a battery cooler (1), an indoor condenser (2), a compressor (3), a water-cooled condenser (4), a power battery (5), a radiator (6), a valve assembly (7) with multiple valve assembly modes, an electric drive component (8), an evaporator (9), a water heater (11), and a three-way valve (12) with multiple states. The indoor condenser (2) and the evaporator (9) are located in the passenger compartment, wherein: The refrigerant output terminal of the battery cooler (1) and the refrigerant output terminal of the evaporator (9) are respectively connected to the refrigerant input terminal of the compressor (3). The refrigerant output terminal of the compressor (3) is connected to the refrigerant input terminal of the indoor condenser (2). The refrigerant output terminal of the indoor condenser (2) is respectively connected to the refrigerant input terminal of the battery cooler (1) and the refrigerant input terminal of the evaporator (9). The refrigerant output terminal of the evaporator (9) is connected to the refrigerant input terminal of the compressor (3). The refrigerant input end of the water-cooled condenser (4) is connected to the refrigerant output end of the compressor (3), and the refrigerant output end of the water-cooled condenser (4) is connected to the refrigerant input end of the battery cooler (1) and the refrigerant input end of the evaporator (9) respectively. The coolant output end of the water heater (11) is connected to the coolant input end of the battery cooler (1), and the coolant output end of the electric drive component (8) is connected to the coolant input end of the water-cooled condenser (4). The coolant output terminal of the battery cooler (1), the coolant input terminal of the water heater (11), the coolant output terminal of the water-cooled condenser (4), the coolant input terminal of the power battery (5), the coolant output terminal of the power battery (5), and the coolant input terminal of the electric drive component (8) are respectively connected to the valve assembly (7). The coolant output end of the radiator (6) is connected to the third end (123) of the three-way valve (12), the coolant input end of the radiator (6) is connected to the first end (121) of the three-way valve (12), and the first end (121) and the second end (122) of the three-way valve (12) are respectively connected to different ends of the valve assembly (7).

2. The thermal management system according to claim 1, characterized in that, The states of the three-way valve (12) include a first three-way valve state and a second three-way valve state, wherein: When the three-way valve (12) is in the first three-way valve state, the first end (121) of the three-way valve is connected to the second end (122) of the three-way valve. When the three-way valve (12) is in the second three-way valve state, the second end (122) of the three-way valve is connected to the third end (123) of the three-way valve.

3. The thermal management system according to claim 2, characterized in that, The valve assembly (7) includes a second valve assembly mode, a first valve assembly mode, a third valve assembly mode, and a fourth valve assembly mode, wherein: In the first valve assembly mode, the coolant input end of the water heater (11) is connected to the second end (122) of the three-way valve, the coolant output end of the battery cooler (1) is connected to the first end (121) of the three-way valve, the coolant output end of the power battery (5) is connected to the coolant input end of the electric drive component (8), and the coolant output end of the water-cooled condenser (4) is connected to the coolant input end of the power battery (5). In the second valve assembly mode, the coolant input end of the water heater (11) is connected to the coolant output end of the power battery (5), the coolant output end of the battery cooler (1) is connected to the coolant input end of the power battery (5), the second end (122) of the three-way valve is connected to the coolant input end of the electric drive component (8), and the coolant output end of the water-cooled condenser (4) is connected to the first end (121) of the three-way valve. In the third valve assembly mode, the coolant output end of the battery cooler (1) is connected to the first end (121) of the three-way valve, the second end (122) of the three-way valve is connected to the coolant input end of the electric drive component (8), the coolant output end of the water-cooled condenser (4) is connected to the coolant input end of the power battery (5), and the coolant output end of the power battery (5) is connected to the coolant input end of the water heater (11). In the fourth valve assembly mode, the second end (122) of the three-way valve is connected to the coolant input end of the water heater (11), the coolant output end of the battery cooler (1) is connected to the coolant input end of the power battery (5), the coolant output end of the power battery (5) is connected to the coolant input end of the electric drive component (8), and the coolant output end of the water-cooled condenser (4) is connected to the first end (121) of the three-way valve.

4. The thermal management system according to claim 3, characterized in that, The thermal management system has a first working mode. In the first working mode, the battery cooler (1), the indoor condenser (2), the compressor (3), the water-cooled condenser (4), and the water heater (11) are turned on, while the radiator (6) and the evaporator (9) are turned off. The valve assembly (7) is in the first valve assembly mode, and the three-way valve (12) is in the first three-way valve state.

5. The thermal management system according to claim 3, characterized in that, The thermal management system has a second working mode. In the second working mode, the battery cooler (1), the indoor condenser (2), the compressor (3), and the water heater (11) are turned on, and the water-cooled condenser (4), the radiator (6), and the evaporator (9) are turned off. The valve assembly (7) is in the second valve assembly mode, and the three-way valve (12) is in the first three-way valve state.

6. The thermal management system according to claim 3, characterized in that, The thermal management system has a third working mode. In the third working mode, the battery cooler (1), the indoor condenser (2), the water heater (11), and the radiator (6) are turned off, and the compressor (3), the water-cooled condenser (4), and the evaporator (9) are turned on. The valve assembly (7) is in the first valve assembly mode, and the three-way valve (12) is in the first three-way valve state.

7. A thermal management method for a thermal management system as described in any one of claims 1 to 6, characterized in that, include: Obtain ambient temperature, passenger cabin heating requirements, and battery heating requirements; Based on the ambient temperature, the passenger cabin heating requirements, and the battery heating requirements, control the valve assembly mode of the valve assembly (7), the state of the three-way valve (12), and control the start or stop of the water heater (11), the battery cooler (1), the indoor condenser (2), the compressor (3), the water-cooled condenser (4), and the evaporator (9).

8. The thermal management method of the thermal management system according to claim 7, characterized in that, The states of the three-way valve (12) include a first three-way valve state and a second three-way valve state, and the valve assembly modes of the valve assembly (7) include a second valve assembly mode, a first valve assembly mode, a third valve assembly mode, and a fourth valve assembly mode, wherein: When the three-way valve (12) is in the first three-way valve state, the first end (121) of the three-way valve is connected to the second end (122) of the three-way valve; when the three-way valve (12) is in the second three-way valve state, the second end (122) of the three-way valve is connected to the third end (123) of the three-way valve. In the second valve assembly mode, the coolant input end of the water heater (11) is connected to the coolant output end of the power battery (5), the coolant output end of the battery cooler (1) is connected to the coolant input end of the power battery (5), the second end (122) of the three-way valve is connected to the coolant input end of the electric drive component (8), and the coolant output end of the water-cooled condenser (4) is connected to the first end (121) of the three-way valve. In the first valve assembly mode, the coolant input end of the water heater (11) is connected to the second end (122) of the three-way valve, the coolant output end of the battery cooler (1) is connected to the first end (121) of the three-way valve, the coolant output end of the power battery (5) is connected to the coolant input end of the electric drive component (8), and the coolant output end of the water-cooled condenser (4) is connected to the coolant input end of the power battery (5). In the third valve assembly mode, the coolant output end of the battery cooler (1) is connected to the first end (121) of the three-way valve, the second end (122) of the three-way valve is connected to the coolant input end of the electric drive component (8), the coolant output end of the water-cooled condenser (4) is connected to the coolant input end of the power battery (5), and the coolant output end of the power battery (5) is connected to the coolant input end of the water heater (11). In the fourth valve assembly mode, the second end (122) of the three-way valve is connected to the coolant input end of the water heater (11), the coolant output end of the battery cooler (1) is connected to the coolant input end of the power battery (5), the coolant output end of the power battery (5) is connected to the coolant input end of the electric drive component (8), and the coolant output end of the water-cooled condenser (4) is connected to the first end (121) of the three-way valve. The method of controlling the valve assembly mode of the valve assembly (7), the state of the three-way valve (12), and the start-up or shutdown of the water heater (11), the battery cooler (1), the indoor condenser (2), the compressor (3), the water-cooled condenser (4), and the evaporator (9) according to the ambient temperature, the passenger cabin heating demand, and the battery heating demand, specifically includes: If the ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating demand is present, and the battery heating demand is present, then the valve assembly mode of the valve assembly (7) is controlled as the first valve assembly mode, the state of the three-way valve (12) is the second three-way valve state, the indoor condenser (2), the water-cooled condenser (4), the battery cooler (1), and the compressor (3) are started, and the evaporator (9) and the water heater (11) are turned off. If the ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating requirement is present, and the battery heating requirement is absent, then the valve assembly mode of the valve assembly (7) is set to the first valve assembly mode, the state of the three-way valve (12) is set to the second three-way valve state, the indoor condenser (2), the battery cooler (1), and the compressor (3) are started, and the water-cooled condenser (4), the evaporator (9), and the water heater (11) are shut down; or If the ambient temperature is greater than or equal to the temperature threshold, and the passenger cabin heating requirement is zero, but the battery heating requirement is present, then the valve assembly mode of the valve assembly (7) is set to the first valve assembly mode, the state of the three-way valve (12) is set to the second three-way valve state, the water-cooled condenser (4), the battery cooler (1), and the compressor (3) are started, and the indoor condenser (2), the evaporator (9), and the water heater (11) are shut down; or If the ambient temperature is below the temperature threshold, and the passenger cabin heating demand is present, and the battery heating demand is present, then the valve assembly mode of the valve assembly (7) is set to the second valve assembly mode, the state of the three-way valve (12) is set to the first three-way valve state, the water heater (11), the indoor condenser (2), the battery cooler (1), and the compressor (3) are started, and the water-cooled condenser (4) and the evaporator (9) are shut down; or If the ambient temperature is below the temperature threshold, and the passenger cabin heating requirement is present, while the battery heating requirement is absent, then the valve assembly mode of the valve assembly (7) is set to the first valve assembly mode, the state of the three-way valve (12) is set to the first three-way valve state, and the water heater (11), the indoor condenser (2), the battery cooler (1), and the compressor (3) are started, while the water-cooled condenser (4) and the evaporator (9) are shut down; or If the ambient temperature is less than the temperature threshold, and the passenger cabin heating requirement is zero, and the battery heating requirement is positive, then the valve assembly mode of the valve assembly (7) is controlled to be the second valve assembly mode, the state of the three-way valve (12) is the first three-way valve state, the water heater (11) is started, and the indoor condenser (2), the battery cooler (1), the compressor (3), the water-cooled condenser (4), and the evaporator (9) are turned off.

9. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to at least one of the processors; wherein, The memory stores instructions executable by at least one of the processors, which, when executed by at least one of the processors, enable the at least one of the processors to perform the thermal management method of the thermal management system as described in any one of claims 7 to 8.

10. A storage medium, characterized in that, The storage medium stores computer instructions, which, when executed by the computer, are used to perform all steps of the thermal management method of the thermal management system as described in any one of claims 7 to 8.

11. A vehicle, characterized in that, It includes a vehicle body and a thermal management system as described in any one of claims 1 to 6, wherein the thermal management system is mounted on the vehicle body.

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